Date: Thu, 28 Jun 2007 08:14:43 -0700 From: Julian Elischer <julian@elischer.org> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: freebsd-current@freebsd.org Subject: Re: SYNCOOKIE authentication problems Message-ID: <4683D063.5040105@elischer.org> In-Reply-To: <20070628151215.GA58165@troutmask.apl.washington.edu> References: <20070628014311.GA50012@troutmask.apl.washington.edu> <20070628105039.GE11335@void.codelabs.ru> <20070628151215.GA58165@troutmask.apl.washington.edu>
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Steve Kargl wrote: > On Thu, Jun 28, 2007 at 02:50:40PM +0400, Eygene Ryabinkin wrote: >> Steve, good day. >> >> Wed, Jun 27, 2007 at 06:43:11PM -0700, Steve Kargl wrote: >>> Any advice on how to isolate or avoid? >>> >>> Jun 27 18:31:19 node11 kernel: TCP: [192.168.0.11]:59661 to >>> [192.168.0.11]:63266 tcpflags 0x10<ACK>; syncache_expand: Segment failed >>> SYNCOOKIE authentication, segment rejected (probably spoofed) >> According to Andre Oppermann, these are harmless: >> http://lists.freebsd.org/pipermail/freebsd-net/2007-June/014401.html >> >> But I am expiriencing some problems related to the other messages >> like 'tcp_input: Listen socket: Spurious RST, segment rejected'. >> Though it seems not to be your case, but my problems are documented >> in the aforementioned thread. Just in case you're curious... >> -- > > Andre certainly knows more about TCP/IP than I, but no, these > are not harmless. Everytime one of these messages appears > on the console, my MPI application hangs and must be restarted. > My large numerical simulations randomly die anywhere from > 15 minutes to 25 hours after launching the job. is the app on that machine or another machine? >
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